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About the Cover
Cover: Antarctic notothenoid fish Trematomus bernacchii foraging in anchor ice in McMurdo Sound. These fish produce antifreeze glycopeptides that are secreted in high concentrations into their blood and allow them to survive in water of -1.8°C (photo courtesy of Kevin Hoefling). Römisch et al. report that the highly cold-sensitive first step of secretion, protein translocation into the ER, is efficient at low temperature in Antarctic organisms and propose that subtle amino acid changes in a protein translocation channel subunit improve its function in the cold (see pp. 2875-2883). This is the first study of the mechanisms of secretion in cold-adapted organisms.
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